Donald Trump's focus has quickly shifted to South Carolina after his win in the New Hampshire primary.

The current Republican front-runner in the polls rallied thousands of people at the T. Ed Garrison Arena in Pendleton on Wednesday.

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During the rally, his team announced that former Chairman of the South Carolina Ports Authority Bill Stern has endorsed Trump. A member of Trump's team told WYFF News 4 that it was initially thought that Stern might endorse Jeb Bush, so they're delighted to have his support.

The arena in Pendleton is used to auction livestock and contains a natural, dirt-like surface. The building is also not fully enclosed, a fact that did not go unnoticed by Trump.

"What kind of building is this, anyway? It's cold in here," he said.

The South Carolina primary is Feb. 20 and Trump is leading in the latest polls. According to the website Real Clear Politics, the real-estate mogul has a 16 point lead over the Iowa caucus winner, Sen. Ted Cruz.

On Wednesday, Trump attempted to fire up his supporters with familiar talking points.

The former president of Mexico recently said that his country would not foot the bill for Trump's proposed wall on the Mexican border.

"I told him that now it's going to be 10 feet higher," Trump said to loud applause.

Trump also took the opportunity to bring his current and former opponents into the limelight. He reminded the crowd that Gov. Chris Christie and Carly Fiorina both dropped out of the race on Wednesday.

He also verbally attacked Jeb Bush and his campaign spending.

"He's spent $20 million in attack ads against me. I had no idea. If he would stop the ads against me, I might stop talking about him," said Trump.